<template>
  <view class="goods-detail-container" v-if="goods_info.goods_name">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" circular>
      <swiper-item v-for="(item,index) in goods_info.pics" :key="index">
        <image :src="item.pics_big" @click="preview(index)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">
        ￥{{goods_info.goods_price}}
      </view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">
          {{goods_info.goods_name}}
        </view>
        <!-- 收藏 -->
        <view class="favi" @click="collection" v-if="!isCollection">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
        <view class="favi" @click="collection"  v-if="isCollection">
          <uni-icons type="star-filled" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">
        快递：免运费
      </view>
    </view>
    <rich-text :nodes="goods_info.goods_introduce"></rich-text>
    <!-- 商品导航组件 -->
    <view class="goods_nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick"
        @buttonClick="buttonClick"></uni-goods-nav>
    </view>
  </view>
</template>

<script>
  import {
    mapState,
    mapMutations,
    mapGetters
  } from 'vuex'
  export default {
    data() {
      return {
        // 商品是否已经收藏
        isCollection: false,
        // 商品详情对象
        goods_info: {},
        // 底部商品导航
        // 左侧图标按钮
        options: [{
            icon: 'shop',
            text: '店铺',
            infoColor: "red"
          },
          {
            icon: 'cart',
            text: '购物车',
            info: 2
          }
        ],
        // 右侧文字按钮
        buttonGroup: [{
            text: '加入购物车',
            backgroundColor: '#ff0000',
            color: '#fff'
          },
          {
            text: '立即购买',
            backgroundColor: '#ffa200',
            color: '#fff'
          }
        ]
      };
    },
    computed: {
      ...mapState('m_cart', ['cart', 'collectionCat']),
      ...mapGetters('m_cart', ['total'])
    },
    onLoad(options) {
      // 获取商品ID
      const goods_id = options.goods_id
      this.getGoodsDetail(goods_id)
      console.log(this.options)
      console.log(this.collectionCat)
      // 判断该商品是否收藏
      this.isCollection = this.collectionCat.findIndex(x=>x.goods_id==goods_id)>-1?true:false
    },
    watch: {
      // 监听total值的变化
      // 页面首次加载完毕后，不会调用这个侦听器
      // 定义total侦听器，指向一个配置对象
      total: {
        // handler属性用来定义侦听器的function处理函数
        handler(newVal) {
          const findResult = this.options.find(x => x.text === '购物车')
          if (findResult) {
            findResult.info = newVal
          }
        },
        // 声明是否再页面初次加载完毕后立即调用
        immediate: true
      }
    },
    methods: {
      ...mapMutations('m_cart', ['addToCart', 'addCollectionCart', 'removeCollectionCart']),

      // 获取商品详细信息
      async getGoodsDetail(goods_id) {
        const {
          data
        } = await uni.$http.get('/api/public/v1/goods/detail', {
          goods_id
        })
        if (data.meta.status !== 200) return uni.$showMsg()
        data.message.goods_introduce = data.message.goods_introduce.replace(/<img/g,
          '<img style="display:block;"')
        this.goods_info = data.message
        console.log(this.goods_info)
      },
      // 预览图片
      preview(index) {
        // 调用uni.previewImage() 方法预览图片
        uni.previewImage({
          // 图片索引
          current: index,
          // 所有图片url地址的数组
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      // 商品导航左侧按钮
      onClick(e) {
        if (e.content.text === '购物车') {
          // 切换到购物车页面
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      // 商品导航右侧按钮
      buttonClick(e) {
        if (e.content.text === '加入购物车') {
          const goods = {
            goods_id: this.goods_info.goods_id, // 商品的Id
            goods_name: this.goods_info.goods_name, // 商品的名称
            goods_price: this.goods_info.goods_price, // 商品的价格
            goods_count: 1, // 商品的数量
            goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
            goods_state: true, // 商品的勾选状态
          }
          // 通过 this 调用映射过来的 addToCart 方法，把商品信息对象存储到购物车中
          this.addToCart(goods)
        }
      },
      // 收藏和取消收藏商品
      collection() {
        // 收藏
        if (!this.isCollection) {
          const goods = {
            goods_id: this.goods_info.goods_id, // 商品的Id
            goods_name: this.goods_info.goods_name, // 商品的名称
            goods_price: this.goods_info.goods_price, // 商品的价格
            goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
          }
          this.addCollectionCart(goods)
          this.isCollection =true
        }else{
          // 取消收藏
          console.log(this.goods_info.goods_id)
          this.removeCollectionCart(this.goods_info.goods_id)
          this.isCollection =false
        }
      }
    }
  }
</script>

<style lang="scss">
  .goods-detail-container {
    padding-bottom: 50px;

    swiper {
      height: 750rpx;

      image {
        width: 100%;
        height: 100%;
      }
    }

    .goods-info-box {
      padding: 10px;
      padding-right: 0;

      .price {
        color: #c00000;
        font-size: 18px;
        margin: 10px 0;
      }

      .goods-info-body {
        display: flex;
        justify-content: space-between;

        .goods-name {
          font-size: 13px;
          padding-right: 10px;
        }

        // 收藏区域
        .favi {
          width: 120px;
          font-size: 12px;
          display: flex;
          flex-direction: column;
          justify-content: center;
          align-items: center;
          border-left: 1px solid #efefef;
          color: gray;
        }
      }

      // 运费
      .yf {
        margin: 10px 0;
        font-size: 12px;
        color: gray;
      }
    }

    .goods_nav {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%
    }
  }
</style>
